Flight number record

DL 528

Delta Air Lines · Los Angeles to Atlanta

Route: LAX → ATL
Departs: 11:05
Flights: 304
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s DL 528, check with Delta Air Lines.

DL 528 earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 304 flights, with a median arrival 5 minutes early.

Set against the rest of the country, DL 528's record is 7 points better than the US average of 77.3%. That gap is worth roughly 74 fewer late arrivals for every thousand flights.

On time

84.7%

Arrivals under 15 minutes late, of 300 completed flights

Avg delay

68 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.89%

1 hour+ late

5.0%

National rate is 8.3%

These figures cover 304 flights between September 2025 and August 2026. The median arrival is 5 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

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Schedule

When DL 528 flies

DL 528 flies LAX to ATL without a single fixed slot. Its most common scheduled departure was 11:05, used on 69 of 304 flights, with 10:50 (35 flights) and 11:45 (34 flights) next.

Departs 11:0569 flights22.7%
Departs 10:5035 flights11.5%
Departs 11:4534 flights11.2%

Scale runs 0% to 100%.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 11:05 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 528 runs 6 points better at 84.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

DL 528 next to LAX to ATL

Every carrier on LAX to ATL combined arrived on time 78.6% of the time across 4,843 flights, so DL 528 is 6 points ahead of it. Delta flew 3,811 flights on the same city pair under all its flight numbers, including this one, and those ran 80.8% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 4 points.

DL 528 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 528thin sample	304	84.7%	68 min	0.00%	B+
All Delta Air Lines on LAX–ATL	3,811	80.8%	66 min	0.84%	B+
All carriers on LAX–ATL	4,843	78.6%	68 min	0.89%	B+
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 528 quarter by quarter

DL 528 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jan–Mar 2026 at 71.9%, a swing of 21 points on roughly 61 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202530 flights93.3%
Oct–Dec 202590 flights79.8%
Jan–Mar 202632 flights71.9%
Apr–Jun 202690 flights85.6%
Jul–Sep 202662 flights93.2%

Scale runs 65% to 100%.

By weekday, DL 528 did best on Saturday at 90.5% on time and worst on Sunday at 77.3%. Each day rests on about 43 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 528 runs when it is late

Most of the lateness is short. 23 of the 46 late arrivals were under half an hour behind, and 15 reached an hour or more.

15+ min early70 flights23.3%
Within 15 min184 flights61.3%
15–29 min late23 flights7.7%
30–59 min late8 flights2.7%
1–2 hours late7 flights2.3%
2+ hours late8 flights2.7%

Scale runs 0% to 100%.

Share of 300 completed flights by arrival against schedule.

9 of 39 late departures made up the time and arrived on time, 23% of them. In the other direction, 16 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ATL.

The worst days

Worst days for DL 528

The latest arrival of the period was on 19 October 2025, 4 hours 51 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).

The latest arrivals of DL 528 in the period
Date	Arrived late by	Largest filed cause
19 October 2025	4 hours 51 minutes	Late-arriving aircraft
21 December 2025	4 hours 39 minutes	Carrier
9 November 2025	4 hours 38 minutes	Carrier
1 January 2026	4 hours 20 minutes	Carrier
4 December 2025	3 hours 36 minutes	Carrier

Delay causes

Why DL 528 runs late

Carrier accounts for 58% of the 3,133 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
58%
Late-arriving aircraft
27%
National Airspace System
13%
Extreme weather
2%

The largest share of delay minutes, 58%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,818 of the 3,133 delay minutes reported here. The split is drawn from 3,133 delay minutes reported on DL 528.

Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

5.0% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

At 1,947 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

The same number turns up on two other city pairs in the data, including BZN to ATL (17) and ATL to BZN (17), but none flew often enough under DL 528 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to ATL only.

One caution: this is a thin sample. 304 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking DL 528

For a booking, read DL 528 as 84.7% on time with 0.00% cancelled over 304 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures